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Test: Distribution System


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10 Questions MCQ Test Power Systems | Test: Distribution System

Test: Distribution System for Electrical Engineering (EE) 2023 is part of Power Systems preparation. The Test: Distribution System questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Distribution System MCQs are made for Electrical Engineering (EE) 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Distribution System below.
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Test: Distribution System - Question 1

A DC 2-wire system with mid-point earthed having cross-sectional area of each conductor be ‘a’ and resistance ‘R1’. If the DC tow wire replaces the system, then the ratio of volume of each conductor V1/V2 will be ___________

Detailed Solution for Test: Distribution System - Question 1

Let the power losses remain constant over the systems, then
2P2R/V2 = 2P2R1/2*V2
or, R = R1/4;
As R = lρ/a;
a1 = a/4;
So, V1/V1 = 1/4.

Test: Distribution System - Question 2

A DC 2-wire system with mid-point earthed having cross-sectional area of each conductor be ‘a’ and resistance ‘R1’. If this is replaced by monopolar system, then saving of copper will be ______

Detailed Solution for Test: Distribution System - Question 2

Let the power losses remain constant over the systems, then
2P2R/V2 = 2P2R1/V2
or, R1 = R
As R = lρ/a;
a1 = a
So, V1/V1 = a* 2l/a1 = 1/2.

Test: Distribution System - Question 3

For the given distribution system the maximum voltage at the midpoint will be ________

Detailed Solution for Test: Distribution System - Question 3

Vmax = V/√2 = (440/2)/√2 = 155.6 V.

Test: Distribution System - Question 4

 A transmission and distribution engineer needed to design the sub transmission substation. The tapping component needed will be ______.

Detailed Solution for Test: Distribution System - Question 4

For the sub transmission level, there is no tapping at various level does not take place. For this a feeder is used.

Test: Distribution System - Question 5

A _________ distribution system is more reliable than the ______ distribution system.

Detailed Solution for Test: Distribution System - Question 5

A parallel distribution system has two end feeding and an alternative of parallel line, so in case there is a fault, the isolator can isolate the faulty part and let the healthy system operate.

Test: Distribution System - Question 6

For the figure shown, having a 2-wire dc system where mid point is unearthed, having resistance of 20 ohms, with a power transmitted of 5 MW at the voltage level of 440 kV.
The power loss of the distribution system will be ________.

Detailed Solution for Test: Distribution System - Question 6

I = P/V = 5000000/440000 = 11.36 A
Power loss = I2 * R = 2 * 11.362 * 20 = 2583 W.

Test: Distribution System - Question 7

While designing the distribution sub stations by the designer, it is required to use the _______ for the discrete power tapping.

Detailed Solution for Test: Distribution System - Question 7

For the discrete tapping of the power the consumer level it is the distributor which is employed at the sub stations and consumer levels.

Test: Distribution System - Question 8

For the single phase 2-wire system, the maximum voltage between the outer wires and earth is ________

Detailed Solution for Test: Distribution System - Question 8

The midpoint voltage will be V/√2.

Test: Distribution System - Question 9

For the figure shown, having a 2-wire dc system where mid point is earthed, having resistance of 20 ohms, with a power transmitted of 5 MW at the voltage level of 440 kV.
The power loss of the distribution system will be __________

Detailed Solution for Test: Distribution System - Question 9

I = P/V = 5000000/440000 = 11.36 A
Power loss = 2I2 * R = 2 * 11.362 * 20 = 5165 W.

Test: Distribution System - Question 10

While designing the distribution to locality of one lac population with medium dense load requirement, we can employ ________.

Detailed Solution for Test: Distribution System - Question 10

A radial system is used for the medium requirement of loading and a medium dense population as it becomes easier to install and operate.

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